package xin.nick.demo;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;

public class CallableThreadTest implements Callable<Integer> {

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        CallableThreadTest callableThreadTest = new CallableThreadTest();
        FutureTask<Integer> futureTask = new FutureTask<Integer>(callableThreadTest);

        for(int i = 0; i < 100; i++) {
            System.out.println(Thread.currentThread().getName()+" 的循环变量i的值"+i);
            if(i == 20) {
                new Thread(futureTask, "有返回值的线程").start();
            }
        }

        System.out.println("子线程返回值:" +  futureTask.get());
    }

    public Integer call() throws Exception {
        int i = 0;
        for(; i < 100; i++) {
            System.out.println(Thread.currentThread().getName()+" "+i);
        }
        return i;
    }
}
